FitzGerald dynasty

The FitzGerald dynasty is a Hiberno-Norman noble and aristocratic dynasty, originally of Cambro-Norman and Anglo-Norman origin. They have been peers of Ireland since at least the 13th century, and are described in the Annals of the Four Masters as having become "more Irish than the Irish themselves" or Gaels, due to assimilation with the native Gaelic aristocratic and popular culture. The dynasty has also been referred to as the Geraldines and Ireland's largest landowners. They achieved power through colonisation and the conquest of large swathes of Irish territory by the sons and grandsons of Gerald de Windsor (c. 1075 – 1135). Gerald de Windsor (Gerald FitzWalter) was the first Castellan of Pembroke Castle in Wales, and became the male progenitor of the FitzMaurice and FitzGerald Dynasty ("fitz", from the Anglo-Norman fils indicating "sons of" Gerald). His father, Baron Walter FitzOther, was the first Constable and Governor of Windsor Castle for William the Conqueror, and was the Lord of 38 manors in England, making the FitzGeralds one of the "service families" on whom the King relied for his survival.

The main branches of the family are:

• The FitzMaurices and FitzGeralds of Kildare (Earls of Kildare from 1316, later Marquesses of Kildare and from 1766 Dukes of Leinster and Premier Peers of Ireland). The current head is Maurice FitzGerald, 9th Duke of Leinster.
• The Fitzmaurices and FitzGeralds of Desmond (Barons Desmond, later Earls of Desmond).